# How to use this action script?

**URL:** <https://forum.kirupa.com/t/how-to-use-this-action-script/116214>\
**Category:** Uncategorized\
**Created:** [July 15, 2004, 4:05pm UTC](https://forum.kirupa.com/t/how-to-use-this-action-script/116214 "2004-07-15T16:05:20Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![felipegm](https://avatars.discourse-cdn.com/v4/letter/f/e9bcb4/32.png) [@felipegm](https://forum.kirupa.com/u/felipegm)\
**Post date:** [July 15, 2004, 4:05pm UTC](https://forum.kirupa.com/t/how-to-use-this-action-script/116214/1 "2004-07-15T16:05:20Z")

</div>

Hi.

I´ve got on robert penners web site some exemples of action script for ease and elastic movement. here is one of the codes I´m trying to apply on a movie to start.

```auto
class com.robertpenner.easing.Elastic {
	static function easeIn (t:Number, b:Number, c:Number, d:Number, a:Number, p:Number):Number {
		if (t==0) return b; if ((t/=d)==1) return b+c; if (!p) p=d*.3;
		if (!a || a < Math.abs(c)) { a=c; var s=p/4; }
		else var s = p/(2*Math.PI) * Math.asin (c/a);
		return -(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
	}
	static function easeOut (t:Number, b:Number, c:Number, d:Number, a:Number, p:Number):Number {
		if (t==0) return b; if ((t/=d)==1) return b+c; if (!p) p=d*.3;
		if (!a || a < Math.abs(c)) { a=c; var s=p/4; }
		else var s = p/(2*Math.PI) * Math.asin (c/a);
		return (a*Math.pow(2,-10*t) * Math.sin( (t*d-s)*(2*Math.PI)/p ) + c + b);
	}
	static function easeInOut (t:Number, b:Number, c:Number, d:Number, a:Number, p:Number):Number {
		if (t==0) return b; if ((t/=d/2)==2) return b+c; if (!p) p=d*(.3*1.5);
		if (!a || a < Math.abs(c)) { a=c; var s=p/4; }
		else var s = p/(2*Math.PI) * Math.asin (c/a);
		if (t < 1) return -.5*(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;
		return a*Math.pow(2,-10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )*.5 + c + b;
	}
}
{

```

Could someone point me some way of usage of theses codes? where to put them? or point me some tutorials or threads?

Thanks